STOCKTON — A 33-year-old man checking the back lot of a business north of the Stockton Channel on Wednesday night encountered three young men. As the intruders fled, one of them fired a silver semiautomatic handgun in the direction of the victim, police reported.The victim was not struck, according to a report.The incident occurred in the 1400 block of West Fremont Street near Pershing Avenue about 11:15 p.m.